return false;
        }
        return true;
    }


    private static boolean checkEncryptionContext ( Smb2NegotiateRequest req, EncryptionNegotiateContext ec ) {
        if ( ec.getCiphers() == null || ec.getCiphers().length != 1 ) {
            log.error("Server returned no cipher selection");
            return false;
        }

        EncryptionNegotiateContext rec = null;

   * b ---- a ---- d
   * |      |
   * |      |
   * e ---- c ---- f
   * }</pre>
   */
  private static final SuccessorsFunction<Character> JAVADOC_GRAPH =
      createUndirectedGraph("ba", "ad", "be", "ac", "ec", "cf");

  /**
   * A diamond shaped directed graph (arrows going down):
   *
   * <pre>{@code
   *   a
   *  / \
   * b   c
   *  \ /
   *   d
   * }</pre>
   */

   * b ---- a ---- d
   * |      |
   * |      |
   * e ---- c ---- f
   * }</pre>
   */
  private static final SuccessorsFunction<Character> JAVADOC_GRAPH =
      createUndirectedGraph("ba", "ad", "be", "ac", "ec", "cf");

  /**
   * A diamond shaped directed graph (arrows going down):
   *
   * <pre>{@code
   *   a
   *  / \
   * b   c
   *  \ /
   *   d
   * }</pre>
   */